Michael Dowse is directing the movie based on Elan Mastai’s script. The plot finds Radcliffe and Kazan meeting at a party and really hitting it off. But she has a long-term boyfriend (Spall), so the pair decide to be friends. But as Harry and Sally could tell us, that’s not always the easiest thing in the world.

Dowse kicks things off this week in Toronto before moving to Dublin.

Spall clearly survived his encounter with nasty alien creatures in Ridley Scott’s latest and has Earthbound, I Give It A Year and Life Of Pi all set for release. Park, who was last seen in Guns, Girls And Gambling, has finished work on college comedy So Undercover and is usually found on US TV drama The Secret Life Of The American Teenager.